This is one of the many possible siren configurations for the 555 integrated circuit. We found it in the October 1992 Radio Electronics magazine. It has a power stage.
The figure shows how to generate excellent quality sinusoidal signals using the XR2206. The...
This simple 1 transistor circuit was found in an American documentation from the 60's. The...
This dividing circuit can be implemented with either TTL or CMOS logic, using the appropriate...